I have akg 271s and was wondering if you can add small amounts of acoustic foam to better insulate your ears from any peripheral sounds? I just want them a bit louder without spending a couple hundred on a good amp. Thanks

Hi, I was wondering about opinions on upgrades in the $300-500 range from AKG MKII's. I really liked the way they sounded, other than seemingly absent of bass. I had bought an amp off ebay that a guy had built, but it added noticeable noise. I like a natural sound without tinny, harsh highs. I...